Electric furnace.



A. HELFBNSTEIN.

ELECTRIG PURNAGE.

AHLIUATION FILED JULY 21,1910.

Patented Aug. 15, 191

UNTTED STATES PATENT orricn.A

ALOIS HEIiFENSTEIN, 0l' VIENNA, AUSTRIA-HUNGARY.

ELECTRIC FUE/NACE.

Specicntion of Letters Patent.

Patented Aug. 15, 1911.

Application llled July 21, 1910. Serial No. 573,128.

To all whom it may concern:

Bc it. lrnoivn that I, Amis HELFENSTEIN, a citizen of the Republic of Switzerland, residing at l l-"orkornigasse, Vienna, Austria- Hiingai", have invented certain new und useful niprovements in Electric Furnaces, of which the following is a specification.

The present invention relates to an electric furnace having a receptacle for the charge and a charge opening which extends the whole length of the furnace chamber.

A pair of girders or supports are arranged along the charge opening, and rest on the end walls of the furnace, which 'rders support the top of the furnace andl the receptacle for the char e, the arrangement being such that when a ull charge of the material to be reduced iS in the furnace, two separate as eliminating chambers are formed, each going provided with its special gas-discharge ,.opening.

iirnace relatively to the direction of discharge of gas, and for insuring a uniform fiow of the gas and preventing any obstruction in consequence of the slopingof the material, the as eliminatinv chambers are enlarged in t e direction of the gas discharge openings.'

The invention is illustrated by way of example in the accompanying drawings, in which:

Figure 1 is 'a vertical transverseA section of an electric furnace constructed in accordance with the principles of the present invention; Fie. 2 is a partial plan view of the same; and ITig. 3 is a plan view of'an-ar` ran ement hereinafter referred to..

Ttlie improved electric' furnace consists of the two side walls A and B and the bottom' C, all of which may be constructed accord ing to any preferred known method. The side walls A and B are connected by means of the end walls g and 7i.. On the top of the furnace two parallel supports di and d are arranged, which are preferably in the form of girders which are cooled by means of water passages, said girders or supports resting on the end walls g and li, of the furnace chamber. The irdcrs d and d2 are spaced apart so as to germ a charge opening which extends the whole length of the furnace chamber, an extension of the furnace in the shape of a supcrposed receptacle b for the purpose of confining the charge of material being arranged above, and supported on.` the girdcrs d and d2. The lateral arched coverings of the furnace chamber a. and a are likewise su ported by the said girders the latter, as eforc iiti'mated, extending along the whole length of the furnace. An upper vertical electrode i, longitudinally ar ranged, is disposed in the charge opening between the girders d and (E and extends nearly the whole length of the furnace chamber; and horizontally arranged in the bttom C of the furnace, is the bottom electrode 1:, the same being horizontally disposed, and also preferably extending nearly the whole length of the furnace chamber. The openings 0 for inspection and manipulation ofthe charge running toward the center and furnished with coverings p. are provided in the arched coverings a' and u?.

In coiisequence f the structure described,

when a fullv charge of material is in the furnace, the same will extend the whole length of the furnace between the tivo grders or supports d' and di, and as the charge of material slopes somewhat outwardly and toward the sides A and B of the furnace, se :irate chambers e and e are formed, into iv ich the reduction gases can escape. At one'end of these spaces or chambers, gasdischarge passages f' and f are arranged, which afford specie outlets for the gas for each gas eliminating chamber. As is shown in Fig. 3, the gas eliminating,chambers are enlarged in the direction of gas discharge, that rs, the furnace chamber is made wider at the gas-discharge ond of the same than at the o posite end h.

1. Electric furnace comprising a suitable reduction chamber, a pair of girdcrs extending from end to end of said chamber and arranged at the top thereof, said girders being spaced apart so as to form a charge opening for theA reduction chamber extending the entire lengt-h of said chamber, a receptacle,

` ing spaced apart so as to forni a charge openarranged `above said by the same to confine arranged above said'girders and supported ing spaced apart so as to form a charge open'n ing. for the reduction chamber extending the entire length of said chamber, 'a receptacle yby the saine to confine the charge, the arrangement being such that when a lfull charge of material is in the fnrnacetwo gas eliminating chambers are formed one to each side of said gii'ders, a passage in an end Wall of the furnace for each gas eliminating chainber for the escape of gas therefrom, a Vertical longitudinally disposed upper eleftrode arranged between the said irdcrs, said upper electrode extending neaiily the whole length of the furnace chamber, and an electrode arranged in the bottom of the furnace. 3. Electric furnace comprising' a suitable reduction chamber, a pair of girders extending from fend to end of said chamber and arranged at the top thereof, said girdcrs being for the reduction chamber extending the entire length of said chamber, a-i'eceptacle girders and supported the charge, the ar-A rangement being such that when .a full charge of material is, in the furnace two gas eliminating chambers are. formedone to cach side of saidgirders, a single vertical longitudinally disposed upper electrode ar4 ranged betweenthe said girders which extends nearly the whole length of the furnace chamber, and an electrode arranged in the bottom bf the furnace. j

4. Electric furnace comprising a. suitable reduction chamber, a pair of (girders extending from end to end f sai chamber and arranged at the top thereof, said girders being spaced apart so as to form a charge opening for the reduction chamber extending the entire' len th ofsaid chamber, a receptaele arranger? above said girders and supported by the arrangement being suoli that when a full charge of material is ,in `the furnace two gas eliminating chambers are formed one to each side of said girdeis, passages in the end wall of the furnace one for each gas eliminating chamber for the escape of gas therefrom. said reduction chamber being wider in cross-section at the gas-discharge end than at the opposite end, a single vertical longitudinally disposed upper electrode arranged between the said girders said upper electrode extending nearly the whole length. of the furnace chamber` andan electrode arranged in the bottom of the furnace.-

trode extending near y .the the same to confine the charge,

Electric furnace comprising`- vertical side walls. a bottom wall with an electrode arranged therein, end walls, ports renting on said i-nd from end to end oi` the furnace ranged at the top thereof` said supports beinteT spaced apart .so-.as to forni a. .:lmrgej opening for the furnace extending the en- :ills extending and an.

a. pair of `sup-A holding a charge Linn-,C500

tire lenoth thereof, a receptacle arranged si above said supports and having two confining-walls carried by said supports for the purpose of holding a charge before it is fed into the furnace, and a vertical longitudi-I nally disposed upper elect-rode arranged 'between said pair of supports, said electrodel extending nearly the Whole length of the furnace chamber.

6..'E1ectric` furnace comprising vertical Aside walls, a bottoni wall with an electrode Varranged therein, end livalls, a

air of supports resting on said end wal s extending from end to end of tlie furnace andarranged at the top thereof, said supports being spaced apart so as to form a charge opening for the.furnace extending the entire length thereof, a rece Jtacle arrangedabove said pair of supports iaving two confining walls carried by said supports for the= purpose of holding a charge before lit is fed into the furnace, a single vertical longitudi- `iially disposed up ier electrode arranged between said pair o supports said upper elec` the' whole length of the furnace chamber, the arrangement being such that when a-full charge of material. is inthe furnace two separate gas eliniinatin0r chambers are .frined one Ato each side of said supports and upper electrode` and two passages arranged in one end Wall of the furnace for the escape of gas therefrom one for each gas eliminating chamber, substantially as described.

7 Electric furnace comprising vertical .side walls, a bottom wall with an electrode arranged therein, end walls, a pair of gird ers resting on said end walls extending from end to end of the furnace and arranged at the top thereof, said girders being spaced apart so as to forni a charge opening for furnace extending the entire length thereof, a receptacle arranged above'said girders having two confining Awalls carried by said girders for the purpose of holding a charge before it is fed into the furnace,.top wallsqfor said furnace also su Sported by said girders, and a single vertical longitudinally disposed upper electrode arranged between said girders, said u per electrode extendinfr nearly the whole ength of the furnace c amber. v 8. Electric furnace' comprising vertical side walls, a. bottoni wall with an electrode arranged therein, end walls, a. pair of. girdei's resting on said end Walls extending from end to end of the furnace and arranged at the topthereof, said girders being, spaced apart. so' as to forni a charge opening for the furnace extending the entire length thereof,l (op walls for said furnace also supported by sind gii'dels, a receptacle arranged above l l l i said girders and having two confining walls carried by said girdersfor the purpose of before it is fed into the fur- 4when n full charge of material 4is in the furnace two Separate gas eliminating chambers are formed'one to each side of said girders and u per electrode, and two pussages arrange in one end wall of the furnace for the escape of gas therefrom one for each as eliminating chamber, said reduction c xamber being wider in cross-section atthe gasdiseharge end than at; the opposite und. 1

In testmon whereof I allx my signature in presence o two witnesses.

ALoIs HELFENSTEIN.

1WVitnesSes:

IGNAz Knonrnmmou'r,- AUGUST Fuoonn.

Gomes o! this patent may be obtained for tive cents' each,.by addressing tho Commissioner of Patents,

Washington, D. C." 

